Do not include hash in useFormAction() for unspecified actions

[brophdawg11]

Do not include the hash in useFormAction(undefined) since it's unavailable on the server and causes a hydration error if included. The original issue this code was added to fix was only referring to the search params not being included, we shouldn't have added the hash then. Users can still get a hash by including it in their action if needed and can manage hydration issues accordingly.

Closes remix-run/remix#6976

[changeset-bot]

🦋 Changeset detected

Latest commit: de78d21

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
react-router-dom	Patch
react-router	Patch
react-router-dom-v5-compat	Patch
react-router-native	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

🤖 Hello there,

We just published version 6.15.0-pre.0 which includes this pull request. If you'd like to take it for a test run please try it out and let us know what you think!

Thanks!

[github-actions]

🤖 Hello there,

We just published version 6.15.0 which includes this pull request. If you'd like to take it for a test run please try it out and let us know what you think!

Thanks!